far as from richmond to new orleans. and when the system grew more complete it was more common for slaves to be sent by railroad and then sole again in new orleans, to slave owners, usually, at that point, and then put to work in the cotton and sugar fields. >> host: what was the going price? >> guest: the going price varied and continued to increase, and one of the things that we know is there was a market that divided people into categories. and so a number of dealers had these things they called price sheets, and these price sheets listed categories, prime men, number one men, boys, 4'3" and above, boy, 4'0" and above. and similar categories for women. and the prices varied. most prime were male field hands, usually ages 15 to 30.